package com.tansun.tandata.entity;

import com.alibaba.fastjson.JSONObject;
import com.tansun.tandata.utils.DateUtils;
import com.tansun.tandata.utils.JsonUtil;
import com.tansun.tandata.utils.MD5Util;
import com.tansun.tandata.vo.req.bi.CarrierTableUserVo;

import java.sql.Timestamp;
import java.util.*;

public class aaa {

    public static  void  main(String[] arg0s)
    {
        JSONObject obj = new JSONObject();
        obj.put("userName",null);
System.out.println(obj.toJSONString());

    }
}
